The PSP Radio application that you are trying to run will not run on a PSP officially updated to the 2.7 firmware because of the security measures that firmware contains. To run unsighned code on a PSP(such as PSP Radio)you would have to "downgrade" your PSP to version 1.5(longtime PSP modders then often "upgrade" their PSP's to one of Dark Alex's custom firmwares, long story). Employing a downgrader program(many of which this site hosts)returns your PSP to 1.5 mode, largely considered as being compatable with the wideast array of unsighned applications(homebrew) on PSP(NesterJ, IRShell etc.)So in short, it's 1.5 firmware you desire.![]()
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